Fluid-pressure-operated stop-valve mechanism for engines.



PATBNTED MAY 28, 1907.

H. R. ROCKWELL. FLUID PRESSURE OPERATED STOP VALVE MECHANISM FOR ENGINES.

APPLICATION FILED 00T.l7, 1906.

3 SHEETS-SHEET 1.

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No. 855,414. PATENTED MAY 28, 1907.

H. R. ROCKWELL.

RESSURE OPERATED STOP VALVE MECHANISM FOR ENGINES.

FLUID P APPLIOATION FILED 00T.17. 1906.

3 SHEETS-SHEET 2.

' No. 855.414. PATENTED MAY 28, 1907.

H. R. ROCKWELL.

FLUID PRESSURE OPERATED STOP VALVE MECHANISM FOR ENGINES.

APPLICATION FILED 00T.1'7, 1906.

3 SHEETS-SHEET 3.

7 77 7,2 6 J0 70 /1\. 77 6/ 76 l' F J ings, wherein is shown the preferred embodi- 4O the scope of the useful Improvements in Fluid-Pressure'-Op .operated stop valve mechanism for engines,

OHATTANOOGA, TENNESSEE, ASSIGNOR' OF ONE- THIRD TO JOSHUA C. W JR, AND ON E-THIRD TO HENRY F. TEMPLE, BOTH OF CHATTANOOGA, TENNESSEE.

FLUlD-PRESSURE-OEERATED STOP-VALVE MECHANISM FOR ENGINES.

HUBERT R. ROCKWELL,

Specification of Letters Patent. Patented Kay 28, 1907.

' Application filed 0mm 17.1906. Serial no. 339.398.

To'all whom, it may concern:

Be itknown that I, HUBERT R. RooKwELL, a citizen of the United States, residing at Chattanooga, in the county of Hamilton and State 0 Tennessee, have invented new and ism for operati the stopvalve when the bearings become ot.

Briefly described theinvention comprises 5 5 fluid pressure operated pneumatic stopvalve for closing the admission of steam to the cylinder, manually-o erated means associating with the valve fiir causing the operation thereof when occasion so requires, and au-. 60.

tomatically-o erable means associating with the valve an operated from the fly wheel of the engine when the speed limit is exceeded, the va erated Sto -Valve Mechanism for Engines, of which t e following is a specification.

This invention relates to afluid pressure and aims to provide in a manner as hereinafter set forth, a mechanism of such class embodying a valvularmember and means arranged in operative relation with respect to the valve for operating it to close the same, thereby discontinuing theoperation of the engine, when the engine exceedsa'certain speed limit, when the bearings become hot and when the cylinder is to be relieved from the water of condensationffiirthennore, to provide in amanner as hereinafter set forth, a manuall -operated means which when operated wil cause the shifting of the valve-to close the steam supply so as to stop the engine when it is desire g he invention further aims to provide a fluid pressure operated pneumatic stop valve and means for o erating it for the purposes hereinbefore set orth,-said'valve and means th being simple in construction and arrangement, strong, durable, efficient in use, and readily set up with respect tothe parts of the engine with which it associates.

With the foregoing and other objects in view, theinvention consists of the novel construction, combination and arrangement of parts hereinafter more specifically described and illustrated in the accompanying drawve when operated clOSIIlg the supply of steam and discontinuing the operat1on'65 of the engine; an automaticallyoperable means associating with the valve for operating it when the be me .hot, the va ve when operated being shifted to close the steam supply, consequently stopping the engine, and an automatically-operable relief means for the cylinder and which associates with the valve and is adapted to o erate the valve for shutti 7 oil, the sup 1y 0 steam so that the en 'ne Wlll be stop (land the cylinder cleane of the water 0 condensation,

The invention further comprises an air compressor operated from the crank shaft of the engine and which communicates' with an and-the regulator is a Re errin to the drawings reference 8' characters l denotes the cyhndei of the en- 5 gine, 2 the steam supply conduit, 3 the crank shaft, 4 the bearings therefor, 5 the fly-wheel and 6 the throttle.- l The foregoing elements mely be of known construction. j I

he stop valve comprises a casing 7 having an inlet 8 and an butlet 9;. The inlet 8 of the casing 7 is secured .to the conduit 2 by the union 10 and the outlet 9 is secured to the throttle valve casing by the union ll. The 9 5 casing 7 is formed with an internally-an ranged slotted web 12, which is'an' integral part of the casing and forms a valve-seat for an oscillato valvular membe ment of the invention, but it is to beunderstood that changes','variations and modifications can be resorted to which come within claims hereunto appended.

In the drawings,wherein like reference characters denote corresponding parts throughout the several views g Figure 1 is aside elevation. Fig. 2 is a sectional'view of the stop valve. Fig. 3 is a. like view ofthe cylinder relief valve. Fig. 4 isa like view of the speed limit tri mechanism for causing the operation 0 the stop valve. Fig. 5 is a like view of the mechanin certain ositions with the slots through the .web 12. hese' latter slots also actmeans for'establishing communication between the upper part of thevalve chamber 7 and the out at 9 when the valvular member 13 is shiited so as to open one or more of the said slots of the member 12. The valvular member 13 is pivoted, as at 14', and is formed with an extension 15 pivotally connected, as at 16, to 'a link 18, the latter being pivotally connected, as at 20, to a differential piston 21 operating in an extension 22 which forms a part of the valve chamber 7 and which also communicates with the latter provided with a seat 24 which is engaged by an automatically operable exhaust valve 25, the latter being provided with a stem 26 which projects from the cas ing 23 and is engaged by an operating mechanism therefor to be hereinafter referred to. An outlet pipe 27 communicates with the valve casing 23 for carrying ofi the exhaust steamx The valvular member 13 at its bottom is'provided with a laterally extending flange 28 having a port therethrough, as at 29. A ipe branch 30 opens into the chamber 7 be ow the member 12 and in the extension 22 at the rear of the differential piston 21 the function of which will be herematter referred to. The valve 25 moved from its seat so as to allow .the exhaust of steam from the extension 22 so that the valvular member 13 can be shifted in one direction to close' through the medium of a fluid-pressure regulator, such re ator when pressure is exhausted there om shifting the valve 25 through an intermediate mechanism so that the valve 25 will be moved from its seat. Pressure is exhausted from the refiilator in a manual manner, automatically w en the ene exceeds a certain speed limit, automatically when the bearings become hotand automatically when it is necessaryto relieve the cylinder 1 of the water of condensation. The said manual means for relieving the pressure from the regulator and the said automatic means will be hereinafter referred to, The ressure regulator com rises a casing 31 in which is arranged a flexillle diaphragm V 32 having connected thereto a stem 33 which is attached to a bell crank 34 an ported, as at 35, one arm of the bell cra being attahed to the stem 33 and the other arm to the stem 26. An inlet 36 for the supply and exhaust of pressure in the casing 31 is provided. When pressure is ap lie to the diaphragm 32 the valve 25 is eld against its seat, but when pressure is released from the diaphragm the valve willbe enabled to be removed from its seat sure in the extension 22 and the action 0 the diaphragm 32 and under such conditions the .steamcan exhaust from the extension 22 so that pressure within the casing 7 will tend to shift the differential piston 21 and consepressure to the regulator, sai

an exhaust valve casing 23,

the slots in the member 12,

owing to the steam res-' quently move the valvular member 13 to closing position.

A means is provided for su. plying fluid means consisting of an air compressor. 37 I operated through the medium of a belt connection 38 from the crank shaft 3 of the engine and cylinder of the com with a reservoir 39 t ough the medium of the discharge pipe 40. A small pipe-.41, which constitutes a supply ipe for the pressure regulator, leads from t e reservoir 39 to the port 36 and said su terposed therein a re ucing known construction.

The manual means sure from thediaphragm ing 31 consists of an exhaust valve 43 at one the ressor communicates ply pipe 41 has in-.'

' valve 42 of for relieving the pr rf '32 within the cas-' end of a pipe branch 44 which communicates with a distributing pipe ing into the supply pipe 41, as M46. The distributing pipe 45 is provided with a. plurality of branch pipes exhaust valve 43 so that the manual operation of relieving pressure from the regulator can be had at various points; The distributing pipe 45 in close proximity to the coup- 45, the latter open- 44, each having an ling between said pipe 45 and branch pipes 44 is provided with a plurality of check valves 47 so that air is discharged only through a d rect pipe from back of the diaphragm 32-to that valve 43 which is o economizes in the use 0 quick action.

A second distributing pipe which communicates throng of the pipe branch-49 with the distributing pipe 45; The distributing pipe 48 communicates, respectively, with the means for caus air and also renders 48 is provided ing the-operation of the valvular. member 13 when it is r of water pressure, with the means for autodesired to relieve the cylinder matically operating the valvular member 13 when the engine exceeds a certain speed limit and with the means for operatmg the valvular member ,13 when the bearings become hot h the medium '95- ened. Such actionthrough the medium ofthe branch pipes 50,

5 1 and 52;. y

The branch pipe 49 and the distributing pipe 48 are rovided with check valves 53 utilized for t e same; function as the check valves 47. ation of the valvular member 13 when ii; is

desired to relieve the cylinder of water comprises a relief valve mechanism consisting of r a casing 54, which connects with the indicator pipe ofthe'cylinder and which is rovided with a valve seat 55, against whic is normally seated a valve 56, having a stem 57 surrounded by a coiled 8 ring 58. The casing 54 carries a yoke 59w ich terminates in a cylindrical extension 50. The extension 60; constitutes an ex: haust valve casing and. is provided with an 60 coupled to the pipe The means for closing the operexhaust valve 61 adapted to engage the seat 72 in close contact with the inner end of the 61. The valve 61 is connected to the stem cylinder 67,; thereby closing it. The arm-85 57 which extends through the yoke 59 and carries an adjustable rod 87, which is posiinto the casing 60. The water in the cylin tioned in the path of the weight 64 so that der will cause the valve 56 to rise from its when the Weight 64 engages the arm 87 it will seat against the tension of the spring 58. shift the arm 85 on its pivot and move the he valve stem 57 will then shift the valve nose 86 out of engagement with the head 79 61 off its seat, thereby opening the casing 60 which will release the spring 80, the expanthrough the yoke 59 to the atmos here and sion thereof causing the disks 72 to be moved :0 relieving pressure from the regu ator, and away from the inner end of the cylinder 67 such action will causethe unseating of the and allow the an to exhaust fromwithin the valve, 25. The steam in the extension 22 casing 65 into the cylinder 67 and out through will then be exhausted and the pressure in the ports 76. Surrounding the cylinder 67 the casing 7 will operate upon the differential and interposed between the flange 71 and the I 5 piston soas to move it outwardly and cause spider 66 is a coiled compression spr" 88,

the shifting of the valvularmember 13 to function of which is to move-the cylmder' close the slots inthe member 12. 67 inwardly when pressure is relieved in the e means for causing an automatic opercasing 65. Providing the cylinder with the ation of the valvular member 13 when the slots 70 permits of'such movement, the in-. 3 20 engine exceeds the speed limit comprises a ward movement of the cylinder 67 beingarsplit 'stud 62 secured to the fly-wheel 5 and rested by the head 79 engaging the sleeve 78. which carries a spring member 63 having a; Owing to the adjustability of the rod 87 it weight 64 at one end which is adapted, can be positioned at various points'so as to through means of centrifugal force when the provide for various speed limits of the. en'- engine exceeds the speed limit, to engage and gine. When the weight 64 trips the arm 85 g: operate the exhaust valve mechanism which so'as to release the disks 72 pressure will be communicates with the upper end of the exhausted from the pressure regulator and branch pipe 51. The exhaust valve mecha'nconse uently the valvular member 13 can be ism consists ofa casing 65, which communishifted so as to close the slotsinthe member 12. cates, as at 66, with the to of the branch The automaticmeansforcausingtheshifting 5 pipe 51. Projecting forwarr ly from the cas- "of the valvular member 13 when the bearings ing 65 is a spider 66, which supports a cylin-' become hot, comprises a supporting arm 89 der 67, the latter extending into the casing carried by-a fixed part of the engine, to which- 65 through an opening 68 inthe head 69 of is attached an exhaust valve "mechanism co'n- 5 said casing, the o ening 68 being of much sisting ofa casing to which is attached the greater diameter t an the cylinder 67. The upper end of the branch pipe 52. The casing cylinder 67 is slotted, as at .70, and also pro- 90 1s formed with a valve seat 91 for the valvvided with a peripheral flange, as at 71. The ular member 92, the latter having a stem- 93 function of the slots 70 and the flange 71 will which is connectedto a lever 94 pivoted at 95 o be hereinafter referred to. to the casing 90, and extending through an 0 formed in the-cylinder 67 The cylinder 67 carries a trip valve conapertured arm' 96 carried by said casing. sisting of a pair of disks 72 secured by the The free end of the lever 94 is apertured as at hold-fast device 73 to a shank 74, the latter 97 and throu hsaidaperture extends a holdterminating in a head 75. The disks 72 are ing-down rod 98 carrying on one end a stop arranged at the rear of thecylinder '67 extenut 99 which engages the lever 94 and at its 1 1o riorly thereof and of much greater diameter. other end issoldered to a cap 100, the .solder The shank 74 is of much less diameter than being such as will melt at a much lower temthe cylinder 67 so as not'to interfere with the perature than Babbitt metal. The cap 100 exhaust of out of the ports 76 which are 1s carried on the lower end of the tubelQl,

Connectedto the head- 75 is a valve stem 1n the 'journal cap and which also extends 77, which extends through a guide sleeve 78 through a guide 103 projecting from the supand carries on its free end a head 79 and in-' 'porting arm 89. When the bearing becomes terposed between the sleeve 78 and the head hot the solder which connects the rod 98 to 5 75 and surrounding the stem 77 isa coiled the cap 100 will melt, which releases the rod.

compression spring 80. The sleeve ,78 is carand consequently also releases the valve 92 ried by an arm 81, whichextends through so that there will benothin to hold the valve the slots'70 and-is secured to a support 82.- 92 to its seat; so there ore the pressure Mounted upon the inner end of the cylinder within the casing 90 will unseat the'valve 67 and operating "within the casing 65 'is a and allow an exhaust to the atmosphere fror2 I2; piston 83 which is retained in ppsition by the the branch pipe 51. 'Such action will relea' disks 72. Pivoted to a brao et 84 at the the pressure upon the diaphragm of the re outer end of the cylinder 67 is a trip arm 85 lator and cause the shifting of the val ar having a nose 86 which is ada ted to eligagg member 13 in a manner as hereinbefore' the head 79 of the stem 77 and hold the is which extends down through an opening 102 1 15 stated. The movementin one directiof'r of I30 a branch 51 sure to' exhaust from the pipe branch 52 the lever 94 is arrested by the upper wall of the opening in the arm 96.

It will be apparent from the foregoing description, taken in connection with the accompan drawings, that if any one of the exhaust va ves 43 is operated manually it member 13 to closing position, thereby discontinuing the steam supply and the operation of the engine.

It will furthermore be apparent that if the engine .exceeds the speed limit the pipe will be opened to the atmosphere, thereby relieving pressure upon the diaphragm of the regulator and consequently cause the automatic shifting of the valvular member 13 'to closing'position and such action will cut off the steam supply and discontinue the operation of the, engine, and'the same action is had when the bearing becomes hot, which will cause the release of the rod 98, thereby permitting the valve 92 to be shifted from its seat and allowing the pres;

an such action will relieve the pressure upon the diaphragm of the regulator and causethe automatic shifting of the valvular member 13 to closing position for the purpose set forth.

The exhaust valves 43 which are manually operated to open position are automatically 0 eratedto closure position owing'to the em p o ment of suita le compression springs which, when such valves are open, compress, and when the valves are released the springs expand, consequently moving the valves to closure position. As this is an obvious construction it is thought unnecessary to show it.

When the exhaust valves 43 are released so they can close, the air from the reservoir 39 wil flow u through the su ply pipe 41 and shift the iaphragm 32,- wiiich 1n cause the closing of the valve 25 thereby shutting off the exhaust of steam from the extension 22. Now if the throttle valve 6 is closed the steam will pass through the fport 29 to the lower art of the casing 7 and there through t e branch fKpipe 30 to tension 22 back of the di the exerential piston 34 the large end of the piston 34 and cause the same to move inwardly, thereby shifting the member 13 to oppn position. The same "action takes place w en the exhaust valve mechanisms for each of the pi 0 branches 5 0, 51 and 52 are closed.

claim is-' What 1. A fluid pressure. operated stop valve of the valvular.

' lato turn willsemi;

mechanism for engines comprising an oscillatory valvular member mounted in a steam supply and shiftable from and to open.p0sition by fluid pressure, a shiftable element operated by steam pressure and connected to said valve for normally retaining said valve in open position, a fluid pressure operated means for causing an exhaust of steam thereby allowing of the shifting of said element in one direction by steam ressure, causing thereby the moving of sai valve to closing position, and means for automatically sup-' plying a pressure of steam against said element when the exhaust has been closed, causing thereby-vthe shifting of said element jnthe opposite dire ion the moving of said valve to open position.

2. A fluid pressure operated stop valve mechanism for engines comprising an oscilvalvular member mounted in a steam and shiftable from a d to 0 en posi- PP Y- normally-closed steam ex aust, a

tion, a

shiftable element impacted upon by the incoming steam and connected to said valve for normally retaining said valve in open position, a fluid pressure operated means for o suing the steam exhaust to allow of the shifting of said element in one direction by the incoming steam, causing thereby the moving of said valve to open osition, and means for automatically supp ying a pressure of steam against said element when the exhaust has been closed, causing thereb the shifting of said element in the opposite rection and the moving of said valve to open position.

3. A fluid pressure operated stop valve mechanism for engines comprising a valvular member shiftable from and to open position for closing and opening the steam supply, a normally closed steam exhaust, a shi table element operated b steam pressure and connected to said va ve for normally retaining saidvalve in open position, means com municating with an air supply for normally retaining the steam exhaust closed, means for exhausting the air thereby permitting of the opening 0 the steam exhaust and the exhaust of steam to allow of the shifting of said element in one direction by the incoming steam, causing thereby the moving of sai valve to closing osition,, and means for auto.- matically sup ying a pressure of steam against said e ement'when the exhaust has been closed, causing thereby the shifting of said element the moving of said valve to open position.

4. A fluid pressure operated stop valve ,mechanism for engines comp a valvular member shift ble to and from c osing position for o mug and closing the steam supply, a diiild rentlal piston connected to said valve for shifting it, means for applying steamafiressure to one end of said piston for norm y retaining the valve open, a steam in the opposite direction and exhaust valve mechanism, means communieating with an air supply for retaining said exhaust valve mechanism normally in position, means for exhausting the air, thereby releasing said exhaust valve mechanism and permitting the steam to exhaust and the shifting of the valvular member to closing position, and means when the exhaust.

of air is discontinued to cause the application of steam pressure against said piston thereby moving the valvular member to open position. i

5. A fluid pressure operated stop' valve mechanism for engines comprisin a valvular member shiftable to and from c osing position for opening and closing the steam supply, a diflerent'ial piston connected to said valve for shifting it, means for applying steam pressure to one end of said piston for normally retaining the valve open, a steamexhaust valve mechamsm, means COIHIIlllDk eating with an air supply for retaining said exhaust valve mechanism normally in closed position, and means for exhausting the air thereby releasing said exhaust valve mechanism and permitting the steam to exhaust and the shifting of the valvular member to closing position.

In testimony whereof I have hereunto set my hand in presence of two subscribing Wit- 30 HUBERT R. ROCKWELL.

Witnesses EDGAR MOKENNEY, EDWARD CLARK. 

